import time

def f1():
    count = 1
    for i in range(1000000):
        count += 1

def f2():
    count = 1
    for i in range(1000000):
        count *= 1

def f3():
    count = 1
    for i in range(1000000):
        count -= 1

def print_run_time(fun):
    start = time.time()
    fun()
    end = time.time()
    print(end-start)

print_run_time(f1)
print_run_time(f2)
print_run_time(f3)